Apparatus for treating yarn with a liquid

ABSTRACT

777,522. Coating yarns. CELANESE CORPORATION OF AMERICA. May 24, 1955 [May 24, 1954], No. 14934/55. Class 140. In a process for continuously treating a running yarn with a liquid while it is travelling in a helical path along an advancing reel, a single treating liquid is applied to the running yarn at two or more points in its path and between each pair of successive points of application the greater part of the liquid applied to and remaining on the yarn is removed by simultaneously squeezing the yarn and applying suction thereto. A yarn 12 is wound to form a helix on a thread advancing reel 11 comprising a number of yarn carrying rollers 13 the axis of at least one of which is askew to that of the reel. Treating liquid is supplied from a header 17 having a supply conduit 18 to a number of sprays 19 which supply successive turns of the yarn as it passes over one of the rollers 13. Used treating liquid is withdrawn from the thread after each application by a sucker roll assembly 21. The sucker roll, which bears on the roller 13 next to the sprays or on one further removed, comprises a hexagonal core through each face of which extends a slot. The core fits into a perforated cylindrical shell, the ends of which are closed by plugs having apertures communicating with brackets&#39; 24 pivotally mounting a header 22 to which suction is applied through conduits 23. A knitted fabric cover 25 is fitted over the sucker roll. The treating liquid removed from the yarn by the sucker roll is withdrawn by the circulating air and may be discarded, recycled with,fresh components or treated to recover components. To increase the rate of treatment a number of such roll assemblies and sources of treating liquid may be used. U.S.A. Specification 2,660,808 is referred to.

APPARATUS FOR TREATING YARN WITH A LIQUID Filed May 24, 1954 2 Sheets-Sheet 1 I 23 22 Y2 8/ 1 9 6 v INVENTOR. App/501v l1. LwvcH I wfl TTOR/YEYS June 9, 1959 A. H. LYNCH APPARATUS FOR TREATING. YARN WITH A LIQUID 2 sheets-Sheet 2 Filed May 24.

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INVENTOR. App/SON H Ly/vcH United States l atent O APPARATUS FOR TREATING YARN WITH A LIQUID I Addison H. Lynch, Rome, Ga., assignor to Celanese Corporation of America, New York, N.Y., a corporation of Delaware This invention relates to a treating system and relates more particularly to an apparatus for treating a yarn with a liquid.

It has previously been proposed to carry out the treatment of a yarn with a liquid during the movement of said yarn in the form of a helix along an advancing reel comprising a plurality of rollers and adapted to rotate around their longitudinal axes. One such arrangement is shown, for example, in US. Patent No. 2,660,808 to J. N. Birmingham. In carrying out the treatment of the yarn in this manner, the efficiency of such treatment, by which efiiciency is meant the rapidity with which any given treatment of the yarn is completed, is of great importance. If the efficiency of the treatment is low, it will be necessary either to reduce the speed of the yarn in its movment around the advancing reel or to increase the size of such reel to get an adequate treatment of the yarn. Both of these expedients increase the expense of the equipment and the labor needed to carry out the treatment of a given amount of yarn. It is therefore highly desirable that the treatment of the yarn with a liquid as it moves along the advancing reel be carried out in a highly efficient manner.

It is an important object of this invention to provide an apparatus for treating yarn with a liquid which will fulfill the foregoing requirements and which will be especially eifective in operation and simple in construction.

A further object of this invention is to provide an apparatus for treating yarn with a liquid during the movement of the yarn in the form of a helix along an advancing reel, which treatment will be carried out with a high degree of efiiciency.

Other objects of this invention, together with certain details of construction and combinations of parts, will be apparent from the following detailed description and claims.

According to the present invention, the treatment of a yarn with a liquid during the movement of said yarn in the form of a helix along an advancing reel, comprising a plurality of rotatable elements or rollers adapted to rotate around their longitudinal axes, is carried out by applying a single treating liquid to said yarn in such a manner that the liquid contacts a plurality of turns of the yarn spaced along the length of the advancing reel. The major portion of the treating liquid applied in this manner is removed from the yarn between the successive applications of fresh liquid to the yarn. As a result, on each application of fresh treating liquid to the yarn, there is little residual treating liquid left on the yarn to contaminate the freshly applied liquid. The treatment of the yarn accordingly takes place with a high degree of efficiency.

In carrying out this invention, the treating liquid may be applied to the yarn from an elongated source arranged along the length of the advancing reel so that fresh treating liquid contacts the yarn at several points spaced along the length of the advancing reel. 'Ihe elongated source may comprise a liquid header having a number of jets therein which direct sprays of treating liquid against the yarn as the said yarn passes over one of the rollers in the advancing reel. By spacing the jets closely it is possible to have fresh treating liquid contact each turn of the yarn in the helix, especially since the treating liquid spreads out along the surface of the roller to some extent.

To remove the major portion of the treating liquid from the yarn between successive applications of the treating liquid thereto, there is provided a sucker roll comprising an elongated hollow roll to the interior of which suction is applied. The said roll is provided with a plurality of perforations extending through the periphery thereof and is positioned to contact the yarn between the successive applications of fresh treating liquid thereto. Advantageously, the sucker roll is freely rotatable and bears against the yarn as the said yarn passes over one of the rollers of the advancing reel so that a highly efiicient removal of the treating liquid from the yarn is effected. The suction applied to the interior of the sucker roll causes a stream of air to flow through the perforations in the sucker roll, carrying with it the treating liquid. The sucker roll may be covered with a fabric which acts to distribute the suction more uniformly over the surface of the said roll. The fabric also acts to absorb from the yarn some of the treating liquid adhering thereto, which liquid is removed from the fabric, during the rotation of the sucker roll, by the stream of air flowing therethrough.

A preferred embodiment of this invention is shown in the accompanying drawings wherein Fig. 1 is a side elevation of the treating apparatus,

Fig. 2 is an end view of the treating apparatus,

Fig. 3 is a perspective view of the sucker roll assemy,

Fig. 4 is a cross-sectional view taken along the line 4 4 in Fig. 3 in the direction of the arrows,

Fig. 5 is a detail cross-sectional view, on an enlarged scale, taken along the line 5-5 in Fig. 4 in the direction of the arrows, and

Fig. 6 is an exploded view showing the construction of the sucker roll.

Referring now to the drawings, the reference numeral 11 designates generally an advancing reel, of the type shown in the Birmingham patent referred to above, to which a yarn 12 is directed from any suitable source,

such as a spin pot (not shown). The yarn travels .around rollers 13 of the advancing reel 11 in the form of a helix 14, being drawn from the advancing reel 11 after it has traversed the full length of the said reel.

As the yarn 12 moves along the advancing reel 11, it

has applied thereto a treating liquid from an elongated source, indicated generally by reference numeral 15,

which serves to direct the liquid to a plurality of successive turns of the said yarn. The elongated liquid source 15 comprises a supporting channel 16 which carries a header 19 and contacts the yarn 12 as the said yarn moves over one of the rollers 13. The yarn 12, wet with the treating liquid, moves on to another of the rollers 13 and during its movement over said other roller passes under a sucker roll assembly, indicated generally by reference numeral 21.

The sucker roll assembly 21 comprises a header 22 to which suction is applied through conduits 23. Pivotally mounted in the ends of the header 22 are a pair Patented June 9, 1959 to which a treating liquid, is supplied. 1 through a conduit 18. The treating liquid emerges from the header 17 in the form of a plurality of sprays Thessuckerroll' comprises" a; hollow hexagonal cores.

26;.which' is providedwith slotszl'. extending therethrough; along the majorv portion. of the" length of each. oh its. faces. The core: 26. fits. snugly into a cylindrical shell 28: having a plurality of; perforations 29.. extending therethrough: and. distributed around its entire circumference..- Tiue; ends of. the cylindrical. shell 28 are closed by means of plugs 31, into which thebrackets 24. fit, and: gaskets that are compressedlbetween the plugs 31 and the ends ofithe, cylindrical. shell. 28. The plugs 31 are each provided with. a portion; having a hexagonal cross-section 33 through; the fiat faces of which extend apertures 34 for applying suctionjfrom the brackets 24 to the interior of.

the sucker; roll 25. Fitted over the sucker roll 25. is a knitted fabric cover. 35 which acts to absorb the treat ingliqnidfrom the'yarn 12 andv to distribute the suction uniformly over the entire, periphery of the sucker roll 25.;

Because of thehexagonal outer surface of plugs 31 and core 26 (Fig. 6) and the cylindrical inner surface of shell 28, six. elongated passageways of arcuate cross-section are; defined thereoetween (not visible in Fig. 4). The

ends of these passageways communicate through. aper-- tunes, 3d with. the interior of plugs 31 which in turn com municate with thehollow brackets 24.

As the yarn 12 passes under the sucker roll assembly 21, ithas removed therefrom, by the suction appliedto thesaidzsucker roll assembly, a large portionof the treating liquid adhering thereto, Then, when fresh treating, liquid is applied to the yarn 12, whenit again passes: under the elongated liquid source 15, the said fresh treating liquid will not be diluted with a large volume of. treating liquid already on the yarn. In this way, there is obtained a plurality of successive treatments of the yarn 12 with fresh treating liquid whereby the efiiciency of such liquid treatment is high and the said liquid treatment will be completed in a relatively short period of time. The treating liquid removed from the yarn 12 is: carried. alongwith the stream of air that is caused to flow through the sucker roll assembly 21. by the suction applied thereto and may be discarded, recycledtog ether: with fresh. make-up or, treated to recover chemical values therefrom, all depending on the nature of the yarn treat: ment and the treating liquid.

.In the: embodiment shown in the drawings, -the sucker roll 25 contacts the yarn. 12 when the said yarn has moved from the. roller 13, where it has the treating liq: uid. applied thereto, to the immediately adjoining roller 13.. Such an arrangement is satisfactory when the. yarn,

treatment takes place with great rapidity after the application of the treating liquid thereto, although it does not go to completion until after several successive treatments. When it is. desired to increase the length of time between the application of. the treating liquid and the. removal of the. major portion thereof by the sucker. roll 25, it is only necessary to shift the sucker roll assembly 21 to bring the sucker roll into contact with the yarn 12 on a roller 13 further removed from the roller 13 at which the treating liquid is applied. It is also possible to dispose a plurality of sucker roll assemblies 25 and liquid sources 15.

All: about. the, periphery. of. the.advancing reel. 11. further. to accelerate the treatment of theyarn 12.

It is to be understood that the foregoing detailed de scription is given merely by way of illustration and that many variations may be made therein without departing from the spirit of my-i'nventiOn.

Havingdescribed my. invention, what Idesire to secure by Letters Patent is:

l. In an apparatus for the treatment of a yarn with a l quid during the-movement of saidyarn inthe'form ofa. helix alongan advancing reel comprising a plurality of rollers adapted to rotate around their longitudinal axes, an. elongated; liquid header having a plurality of jets for directing a plurality of streams of a single treating liquid against a plurality of turns of theyarn spaced along the length of the advancing reel, a header to which suction is applied, a pair of hollow brackets pivotally mounted inrsaidtsuctionheader and in communication with the interror; ofsaid: suction header, anda hollow sucker roll having a plurality of apertures in its circumference 1'0 tatahly. mounted between said brackets and in communicationrwith. the interior of. said: brackets whereby suctionis:.applied.to. the interior of said sucker roll, said. sucker. roll being-adaptedto bear-against the yarn for removing from the: yarn. the major: portion of the treating liquid applied; thereto between; successive applications of fresh treating. liquid to the yarn.

2. In. an.apparatus.for; the treatment of a yarn with a. liquid: during the. movement of: said yarn in the form of a. helix' along an, advancing reel comprising a plurality: of; rollers. adapted. to, rotate around;v their longitudinal: flXes', an elongated. liquidheader' having a plurality of. jets forsdirectingae, plurality ofstreams of a single treats mg, l quid, against aplurality of successive. turns of the yarn spaced along the length of, the advancing reelwhil'esaid. yarn passes over one of the rollers of theadvancsingreel, a header to which suction is applied, a. pair of hollow-brackets pivotallyrnounted insaid; suction header; and. in. communication. with. the interior of said. suction: headera. hollow sucker roll having a plurality ofjapertures in the circumference thereof rotatably mountedbetween said. brackets and in communication with the interior of. said' brackets; whereby suction is applied to the interior of said. sucker roll, said sucker roll being adaptedtobear against the yarn while said yarn passes over another of the rollers of the advancing reel for removing; from. the; yarn the major portion of the treating liquid applied thereto between successive applications of fresh treating liquid to the yarn, and afabric covering said. sucker roll for distributing the suction more uniformly over the sucker roll.

References. Cited in. the, file. of this patent UNITED STATES PATENTS 1.597.872 Olson: Jan. 8, 1229 1,814,866.- Stride; e. July 14, 1931, 2,504,703; Kuljian. no--- Apr. 18, 195.0. 2,572,268. K liian Oct. 23, 195.1. 2,583,515; Mayner Jan. 22, 1952 2,634,887 Negro July 27, 1954 2,690,968. Kuljian Sept. 28, 19,514. 2,690,405.. Lowe Sept. 28, 1954- 2,694,308-v Kuljian Nov. 16, 1954. 2,748,588 Kuljian. June- 5, 195.6 

